On September 25, 1237, Henry III of England and Alexander II of Scotland signed the Treaty of York at York, England. The Treaty of York established most of the current boundary between England and Scotland, making it one of the oldest existing political borders in the world.
 
Although both England and Scotland are part of the United Kingdom (along with Wales and Northern Ireland), there are many cultural distinctions between the countries. English is the official language in both countries, for instance, but Scotland also recognizes Scottish Gaelic and Scots, while England also recognizes Cornish.
Noun

natural or artificial line separating two pieces of land.

Noun

line separating geographical areas.

Cornish
Noun

people and culture native to Cornwall, England.

culture
Noun

learned behavior of people, including their languages, belief systems, social structures, institutions, and material goods.

distinction
Noun

difference.

establish
Verb

to form or officially organize.

Gaelic
Noun

Celtic language and culture native to what are now Scotland, Ireland, and the Isle of Man.

official language
Noun

language adopted by the government of a nation or other political unit.

political
Adjective

having to do with public policy, government, administration, or elected office.

recognize
Verb

to identify or acknowledge.

Scots
Noun

Germanic language spoken in Scotland and Northern Ireland. Also called Lowland Scots.

treaty
Noun

official agreement between groups of people.

United Kingdom
Noun

nation made of the countries of England, Wales, Scotland, and Northern Ireland.